package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.github.xiaoymin.knife4j.core.util.CollectionUtils;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.task.Websocket.WebSocketServer;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class OrderServicelmpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private WebSocketServer webSocketServer;

    private Orders orders;



    /**
     * 用户下单
     * @param ordersSubmitDTO
     * @return
     */
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
//        处理各种业务异常(地址簿为空，购物车数据为空)
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if(addressBook==null) {
            //抛出业务异常
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
//        查询当前购物车情况
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> ShoppingCartList = shoppingCartMapper.list(shoppingCart);
        if (ShoppingCartList == null || ShoppingCartList.isEmpty()) {
            throw  new AddressBookBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }


//        向订单表中插入一条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, orders);

        orders.setUserId(userId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(orders.PENDING_PAYMENT);
        orders.setStatus(orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setAddress(addressBook.getDetail());
        this.orders = orders;

        orderMapper.insert(orders);

        List<OrderDetail> orderDetailList = new ArrayList<OrderDetail>();
//        项订单明细表中插入n条数据
        for (ShoppingCart cart : ShoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();/*订单明细*/
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(orders.getId());/*设置当前订单明细关联的订单id*/
            orderDetailList.add(orderDetail);
        }
        orderDetailMapper.insertBatch(orderDetailList);

//        清空当前购物车数据
        ShoppingCart shoppingCart1 = new ShoppingCart();
        shoppingCart1.setUserId(userId);
        shoppingCartMapper.deleteByUserId(shoppingCart1);
//        封装VO返回结果
        OrderSubmitVO build = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .build();


        return build;
    }

    /**
     * 历史订单查询
     * @param page
     * @param pageSize
     * @param status
     * @return
     */
    @Override
    public PageResult pageQuery4User(int page, int pageSize, Integer status) {
        //需要在查询功能之前开启分页功能：当前页的页码   每页显示的条数
        PageHelper.startPage(page,pageSize);
        //封装所需的请求参数为DTO对象
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setStatus(status);
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());

        // 分页条件查询
        Page<Orders> page1 = orderMapper.pageQuery(ordersPageQueryDTO);
        //由接口可知需要封装为orderVO类型：订单菜品信息orderDishes，订单详情orderDetailList
        List<OrderVO> list =new ArrayList<>();
        // 查询出订单明细，并封装入OrderVO进行响应
        if(page1!=null && page1.getTotal()>0) {/*确保有订单存在*/
            for (Orders orders : page1) {
//                获得订单id
                Long ordersId = orders.getId();
//                根据订单id，查询订单的明细
                List<OrderDetail> orderDetails =  orderDetailMapper.GetByOrderId(ordersId);

                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetails);
                list.add(orderVO);
            }
        }
        return new PageResult(page1.getTotal(),list);
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

//        //调用微信支付接口，生成预支付交易单
//        JSONObject jsonObject = weChatPayUtil.pay(
//                ordersPaymentDTO.getOrderNumber(), //商户订单号
//                new BigDecimal(0.01), //支付金额，单位 元
//                "苍穹外卖订单", //商品描述
//                user.getOpenid() //微信用户的openid
//        );
//
//        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
//            throw new OrderBusinessException("该订单已支付");
//        }
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("code", "ORDERPAID");
        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString(  "package"));
        Integer OrderStatus = Orders.TO_BE_CONFIRMED; //订单状态，待接单
        Integer OrderPaidStatus = Orders.PAID; //支付状态，已支付
        LocalDateTime check_out_time = LocalDateTime.now(); //更新支付时间
        orderMapper.updateStatus(OrderStatus, OrderPaidStatus, check_out_time, this.orders.getId());
        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

//        通过websoceket向客户端浏览器推送消息  type  orderid  content
        Map map =  new HashMap<>();
        map.put("type",1);/*1表示来单提醒，2表示客户催单*/
        map.put("orderId",this.orders.getId());
        map.put("content","订单号" + this.orders.getNumber());

        String json = JSONObject.toJSONString(map);
        webSocketServer.sendToAllClient(json);

    }


    /**
     * 查询订单详情
     * @param id
     * @return
     */
    @Override
    public OrderVO details(Long id) {
        // 根据id查询订单
        Orders orders = orderMapper.getById(id);
        // 查询该订单对应的菜品/套餐明细
        List<OrderDetail> orderDetailList = orderDetailMapper.GetByOrderId(orders.getId());

        // 将该订单及其详情封装到OrderVO并返回
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(orderDetailList);

        return orderVO;
    }

    /**
     * 取消订单功能
     * @param id
     */
    public void userCancelById(Long id) {
        // 根据id查询订单
        Orders orders = orderMapper.getById(id);
        // 校验订单是否存在
        if(orders==null) {
//            如果不存在，抛出异常
            throw new AddressBookBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        Integer status = orders.getStatus();
        if(status > 2) {
            throw  new AddressBookBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //以上验证都通过后，此时订单处于待支付 1 和待接单状态 2 下
        Orders orders1 = new Orders();
        orders1.setId(orders.getId());

//         订单处于待接单状态下取消，需要进行退款
        if (orders1.getStatus().equals(orders.TO_BE_CONFIRMED)) {
            //调用微信支付退款接口
            try {
                weChatPayUtil.refund(
                        orders.getNumber(), //商户订单号
                        orders.getNumber(), //商户退款单号
                        new BigDecimal(0.01),//退款金额，单位 元
                        new BigDecimal(0.01));//原订单金额
            } catch (Exception e) {
                throw new RuntimeException(e);
            }

            //支付状态修改为 退款
            orders.setStatus(Orders.REFUND);
        }

//         更新订单状态、取消原因、取消时间
        orders1.setStatus(Orders.CANCELLED);
        orders1.setOrderTime(LocalDateTime.now());
        orders1.setCancelReason("用户取消");
        orderMapper.update(orders1);
    }
    /**
     * 再来一单
     * @param id
     */
    @Override
    public void repetition(Long id) {
        // 查询当前用户id
         Long userId= BaseContext.getCurrentId();
        // 根据订单id查询当前订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.GetByOrderId(id);
        // 将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();
            // 将原订单详情里面的菜品信息重新复制到购物车对象中
            BeanUtils.copyProperties(x, shoppingCart, "id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());

            return shoppingCart;
        }).collect(Collectors.toList());
        // 将购物车对象批量添加到数据库
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    /**
     * 搜索订单
     * @param ordersPageQueryDTO
     * @return
     */
    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
//        设置分页查询
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());

        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO

        List<OrderVO> orderVOList = getOrderVOList(page);

        return new PageResult(page.getTotal(), orderVOList);
    }

    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        // 需要返回订单菜品信息，自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();

        List<Orders> ordersList = page.getResult();
        if (!CollectionUtils.isEmpty(ordersList)) {
            for (Orders orders : ordersList) {
                // 将共同字段复制到OrderVO
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                String orderDishes = getOrderDishesStr(orders);

                // 将订单菜品信息封装到orderVO中，并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }

    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.GetByOrderId(orders.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }

    /**
     * 各个状态的订单数量统计
     * @return
     */
    @Override
    public OrderStatisticsVO statistics() {
        // 根据状态，分别查询出待接单、待派送、派送中的订单数量
        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消 7退款
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);/*待接单*/
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);/*待派送*/
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        // 将查询出的数据封装到orderStatisticsVO中响应
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }

    /**
     * 接单
     * @param ordersConfirmDTO
     */
    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders build = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();
        orderMapper.update(build);
    }

    /**
     * 拒单
     * @param ordersRejectionDTO
     */

    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {
        // 根据id查询订单
        Orders orders = orderMapper.getById(ordersRejectionDTO.getId());
        // 订单只有存在且状态为2（待接单）才可以拒单
        Integer status = orders.getStatus();
        if(status ==null || !orders.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw  new AddressBookBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //支付状态
        Integer payStatus = orders.getPayStatus();
        if (payStatus == Orders.PAID){
//            如果用户已经支付，则需要退款
//            调用微信退款
            try {
                weChatPayUtil.refund(
                        orders.getNumber(), //商户订单号
                        orders.getNumber(), //商户退款单号
                        new BigDecimal(0.01),//退款金额，单位 元
                        new BigDecimal(0.01));//原订单金额
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }
        // 拒单需要退款，根据订单id更新订单状态、拒单原因、取消时间
        Orders orders1 = new Orders();
        orders1.setId(orders.getId());
        orders1.setStatus(Orders.TO_BE_CONFIRMED);
        orders1.setOrderTime(LocalDateTime.now());
        orders1.setRejectionReason(ordersRejectionDTO.getRejectionReason());

        orderMapper.update(orders1);
    }

    /**
     * 取消订单
     * @param ordersCancelDTO
     */
    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO) throws Exception {
        // 根据id查询订单
        Orders orders = orderMapper.getById(ordersCancelDTO.getId());
        //支付状态
        Integer status = orders.getStatus();
        if (status ==Orders.PAID) {
            //用户已支付，需要退款
            //            调用微信退款
            weChatPayUtil.refund(
                    orders.getNumber(), //商户订单号
                    orders.getNumber(), //商户退款单号
                    new BigDecimal(0.01),//退款金额，单位 元
                    new BigDecimal(0.01));//原订单金额

        }
        // 管理端取消订单需要退款，根据订单id更新订单状态、取消原因、取消时间
        Orders orders1 = new Orders();
        orders1.setId(orders.getId());
        orders1.setStatus(Orders.TO_BE_CONFIRMED);
        orders1.setOrderTime(LocalDateTime.now());
        orders1.setRejectionReason(ordersCancelDTO.getCancelReason());

        orderMapper.update(orders1);
    }

    /**
     * 派送订单
     * @param id
     */
    @Override
    public void delivery(Long id) {
        // 根据id查询订单
        Orders orders = orderMapper.getById(id);
        // 校验订单是否存在，并且状态为3
        Integer status = orders.getStatus();
        if ((orders == null || !status.equals(Orders.CONFIRMED))) {
            throw  new AddressBookBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        // 更新订单状态,状态转为派送中
        Orders orders1 = new Orders();
        orders1.setId(id);
        orders1.setStatus(Orders.DELIVERY_IN_PROGRESS);
        orders1.setOrderTime(LocalDateTime.now());

        orderMapper.update(orders1);
    }

    /**
     * 完成订单
     * @param id
     */
    @Override
    public void complete(Long id) {
        // 根据id查询订单
        Orders orders = orderMapper.getById(id);
        // 校验订单是否存在，并且状态为
        Integer status = orders.getStatus();
        if ((orders == null || !status.equals(Orders.DELIVERY_IN_PROGRESS))) {
            throw  new AddressBookBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        // 更新订单状态,状态转为派送中
        Orders orders1 = new Orders();
        orders1.setId(id);
        orders1.setStatus(Orders.COMPLETED);
        orders1.setOrderTime(LocalDateTime.now());

        orderMapper.update(orders1);
    }

    /**
     * 客户催单
     * @param id
     */
    @Override
    public void reminder(Long id) {
// 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);
        // 校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Map map = new HashMap();
        map.put("type",2);
        map.put("orderId",id);
        map.put("content","订单号："+ordersDB.getNumber());
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }

}
